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Physics 10th Class Past Papers Lahore 2023 Group 1
Physics 10th Class Lahore Board Subjective 2023 Group 1
- Write short answers to any Five (5) Questions.
- i. What are two components of CRO?
- ii. Draw a labelled diagram of Ball and Bowl System.
- iii. State the laws of refraction of light.
- iv. What is restoring force? Give an example.
- v. Define electromagnetic waves with an example.
- vi. What is electron gun.
- vii. Differentiate between convex and concave mirrors.
- viii. What is meant by critical angle? Draw its diagram.
- Write short answers to any five (5) questions.
- i. Define loudness of sound.
- ii. What is meant by intensity level of sound? What is its SI unit?
- iii. Define capacitor and write its formula.
- iv. Draw the label diagram of electroscope.
- v. Which instrument is used to observe sound waves?
- vi. What is meant by primary memory?
- vii. What is ATM? Also write its any one advantage.
- viii. What is Electronic Mail (E-Mail)? Also write its one benfit.
- Write short answers to any FIVE (5) questions.
- i. What is mutual induction?
- ii. Describe Fleming’s left hand rule to find the direction of force.
- iii. Differentiate between direct current and alternating current.
- iv. Differentiate between natural and artificial radioactivity.
- v. What is cosmic radiation? Give example.
- vi. How potential difference can be measured?
- vii. How many watt hours in joules?
- viii. What is ionization? What is its power?
SEC II
Note: Attempt any TWO (2) Questions.
- (a) what is prism? Explain with diagram the path of light through the prism. Also define angle of deviation.(4)
- 5(b) A pendulum of length 0.99m is taken to the moon by an astronaut. The period of the pendulum is 4.9s. what is the value of ‘g’ on the surface of the moon?
- (a) Explain the electrostatic by example of electrostatic powder spray painting.
- 6(b) If at a Anarkali Bazaar Lahore intensity level of sound is 80db, what will be the intensity of sound there.
- (a) What is meant by Half Life? Explain with the help of graph.
- 7 (b) A step-up transformer has a turn ratio 1:100. An alternating supply of 20v is connected across the primary coil. What is the secondary voltage?
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